LightLLM through 1.2.0 contains a remote code execution vulnerability in the router profiler service when started with --enableprofiling flag. The service exposes an unauthenticated RPyC server with pickle deserialization enabled, allowing attackers to execute arbitrary code by sending crafted serialized objects to the profiler command queue.

LightLLM through 1.2.0 contains a memory exhaustion vulnerability in the NCCL control channel when started with --pdtransmode nccl, allowing unauthenticated attackers to exhaust KV-transfer worker memory. Attackers can call the exposedsetvalue method to store unbounded key-value pairs without size limits, causing the worker process to crash and triggering node failure.

LightLLM through 1.2.0 mounts reinforcement learning control routes on the public HTTP API without authentication checks. Unauthenticated attackers can call endpoints like /pausegeneration, /abortrequest, /flushcache, and /initweightsupdategroup to disrupt inference operations and wedge workers on deployments started with --enablerl.

LightLLM through 1.2.0 fails to validate imageurl and audiourl parameters in multimodal endpoints, allowing unauthenticated attackers to perform server-side request forgery. Attackers can supply arbitrary URLs to fetch internal resources, with vision model processing disclosing content or error responses revealing internal network topology.